The Outer Limits Wiki

In the revival series episode "Seeds of Destruction", Macroseed, a cutting edge biotechnology company, chooses the small farming town of Hobson to test and develop TX-40. TX-40 is a new genetically-engineered strain of fast-growing corn that could increase yields and make the company millions of dollars. Linda Andrews, the veterinarian in Hobson, begins to wonder about the safety of TX-40 when a farmer brings in a dead cat from his field. The cat has horrible mutations, including a giant tumor which sprouts a fifth leg.

In their haste to develop the new corn and with no concern for ethics or safety, Macroseed has used hormones and genetically mutated components, turning the corn into an oncogenetic lethal nightmare that may never be fully eradicated.